1.

A lighthouse facing north, sends out a beam of light extending from north-east to the north-west. An observer on a steamer sailing due west, first sees the light when he is 5 km away from the light house and continues to see it for 30√2 minutes. What is the speed of the steamer?

Answer»

A lighthouse facing north, sends out a beam of light extending from north-east to the north-west. An observer on a steamer sailing due west, first sees the light when he is 5 km away from the light house and continues to see it for 302 minutes. What is the speed of the steamer?



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